Apparatus for scrubbing milk-cans.



No. 695,828. Patented Mar. l8, I902.

R. NELSON.

APPARATUS FOR SCBUBBING MILK CANS.

(Application filed Mar. 21.4901.) (N B 4 Sheets-$haet l.

No. 695,828 Patented Mar. l8, I902. R. NELSON. APPARATUS FOR SCRUBBINEMlLK CANS.

(Application film! Mar. 21, 1901.) (No Model.) 4 Sheets-Sheet 2.

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HlllllHllllllllil llllllllllll Z O H 8 ,r a M d e t n e a P N U S L E NR 8 2 5 9 6 nw N APPARATUS FOR SCRUBBING MILK CANS.

(Application filed Mar. 21, 1901.)

4 Shaets-Sheet 3.

(No Modem flwhamldhwa z a I.

No. 695,828. Patented Mar. 18, I902.

B. NELSON.

APPARATUS FOR SCRUBBING MILK CANS.

(Application filed Mar. 21, 1901.) (No Model.) 4 Sheets-Sheet 4.

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Unrrnn Snares PATENT (lemon.

RICHARD NELSON, OF MONKTON, MARYLAND.

APPARATUS FOR SCRUBBING MILK-CANS.

SPECZFIGATIQN formingpart of Letters Patent No. 695,828, dated March 18,1902. Application filed March 21, 1901- Serial No. 52,227. (No model.)

T0 at whom it may concern:

Be it known that I, RICHARD NELSON, a citizen of the United States,residing at Monkton, in the county of Baltimore and State of Maryland,have invented new and useful Improvements in Apparatus for ScrubbingMilk-Cans, of which the following is a specification.

My invention relates to apparatus for washing and scrubbing milk-cansand the like, the object of the same being to provide novel meanswhereby a milk-can or other device may be rotated in a tank containingwashing or cleansing liquid and simultaneously scrubbed on both itsinterior and exterior sur faces.

Other objects of the invention will hereinafter appear.

The invention consists in certain features and details of constructionand combinations of parts, which will be hereinafter more fullydescribed and claimed.

In the drawings forming part of this specification, Figure l is aperspective view illustrative of my invention, showing the device inposition to receive a milk-can. Fig. 2 is a vertical centrallongitudinal section of the same. Fig. 3 is a plan view. Fig. 4 is acrosssection on the line 4 4 of Fig. 2. Fig. 5 is a front elevation ofthe chuck for the lower end of the can. Fig. 6 is an edge view of thesame. Fig. 7 is a detail perspective view of one of the movablelocking-dogs forming part of the chuck. Fig. 8 is a sectional elevationshowing the construction and arrangement of the device for washing andscrubbing the cantops; Fig. 9 is a rear elevation of the block in whichthe can-top is secured. Fig. lOis a detail View showing a modified formof collapsible brush for the interior of the can.

Like reference-numerals indicate like parts in the different views.

In carrying out my invention, I employ a tank 1, preferably rectangularin shape, having a sheet-metal bottom 2, covered with a layer 3 ofasbestos or other like material, the said bottom 2 being secured to thesides and ends of the tank by means of the tie-rods 4. The tank 1 ismounted upon asuitable framework or support 5 and has a discharge-spoutor faucet 6 at one end thereof, by means of which the liquid in the tankmay be drawn off when desired. The said tank may be filled with water orother suitable cleansing material, and the same may be heated by anysuitable form of heat-generator located beneath the bottom 2. The layerof asbestos on the upper side of the bottom 2 serves to prevent the heatfrom being conveyed to the wooden sides or ends of which the tank 1 ismade.

Located at one end of the tank 1 is a brushcarrying frame 7, the sameconsisting of the beams S and 9, secured together on their rear sides bythe vertical straps 10 and having rigidly connected to the upper edge ofthe beam 9 a shaft 11. Said shaft 11 is parallel to the ends of the tank1 and is mounted in bearings in the notches 12 in the sides of saidtank. One end of said shaft projects beyond the side of the tank and isprovided with a crank or handle 13, by means of which the shaft 11 maybe turned and the brush-carrying frame 7 moved into and out of the tank.Secured to the center of the beam 8 of the frame 7 and extendingoutwardly therefrom at right angles to said frame is a rod 14,constituting the stem of a collapsible brush 15. The said rod 14 isreinovably secured within the frame 7 by means of a set-screw 16. Therod 14 has a cylindrical portion adjacent to the beam 8,which issurrounded by a stiff coilspring 17, and an enlarged rectangular portion18 at its free end, forming a shoulderlE). Loosely mounted on thecylindrical portion of the rod 14 is what may be termed a chuck 20, thesame consisting of a block having V- shaped grooves 21 thereinconcentric with the rod 14. Also secured to said block 20, outside thegrooves 21, is an annular metal band or ring 22, the said ring and thesaid grooves being designed to receive the neck of a milk-can 28, aswill readily appear. The block 20 is normally urged outwardly againstthe shoulder 19 by means of the spring 17; but of course it may beforced rearwardly against the action of said spring. When the neck ofthe can is seated in the grooves 21 or is located in frictional contactwith the ring 22 and pressure is applied to the bottom of said can, thespring 17 will act to retain the block 20 in frictionalengagementwithsaid can. The collapsible brush 15 is made up of the sections 24, 25,26, and 27, pivoted to each other, as shown. The end section 24 ispivoted to the rectangular portion 18 of the rod 14, which consti tutesthe stem of the brush,,by means of the links 28, and the opposite endsection 27 is pivoted adjacent to its central portion to the parallelarms 29, secured to the side edges of the rectangular portion 18 of thebrush stem, and extends outwardly beyond the end thereof. The innercorner of the section 24 is pivoted to the adjacent inner corner of thesection 25, whereas the outer corner of the section 25 is pivoted to theadjacent outer corner of the section 26. The section 27 is pivoted atits inner corner to the adjacent portion of the section 26. By thisconstruction it will be seen that the brush 25 may be collapsed, asshown in Fig. 1 of the drawings, to enable the same to enter thecontracted neck of the can 23 to be cleaned, and expanded, as shown inFig. 3 of the drawings, so that the bristles willcome in contact withthe inner surface of the can at all points. WVhen the brush iscollapsed, the section 27 is turned so that it assumes a positionsubstantially in line with the stem of the brush, and the sections 25and 26 are substantially parallel thereto and in comparatively closerelation therewith. When the brush is in its expanded position, thesection 27 thereof lies at right angles to the stem of the brush, thesection 25 is diagonally arranged with respect thereto, while thesection 26 is substantially parallel to the stem, but is removed to anappreciable distance therefrom. The section 27 and the end of thesection 26 serve to scrub the inner surface of the bottom of the can.The section 24 serves to scrub the inner surface of the neck of the can,whereas the diagonally-arranged section 25 serves to scrub the innersurface of the tapering portion of the can between lhe neck and thecylindrical sides thereof.

In the tank 1, at the end thereof opposite the brush-carrying frame 7,is a frame 30, made up of the side bars 31, having slots 32 in theirlower ends, the connecting rod or bar 33, constituting a handle at theirupper ends, and a beam 34, pivoted to the side bars 31 at a pointintermediate their ends and capable of a rocking movement thereon. Theframe is supported upon the trunnions 35, secured to one end of the tank1, extending inwardly and longitudinally thereof and projecting throughthe loops or staples 36 on the under side of the beam 34. The beam 34rests upon the trunnions and is maintained at all times at the samelevel thereby. The slots 32 in the side bars 31 of the frame 30 embracea cross-bar 37, connecting the sides of the tank 1, parallel to the endsthereof. By this construction it will be seen that by grasping thehandle 33 the frame 30, carrying the beam 34, may be moved back andforth, so as to cause the same to approach orrecede from the end of thetank 1 on which the brushcarrying frame 7 is located. Secured to thebeam 34 and extending upwardly therefrom is a bracket 38, made up'of twoparallel archshaped members and having bearings 39 for the maindrive-shaft 40. The said shaft 40 extends out through one end of thetank 1 and has an operating crank or handle 41 thereon. Secured to theshaft 40 and located between the two parallel members of the archshapedbracket 38 is a driving-gear 42, which meshes with a pinion 43, securedto a counter-shaft 44, mounted in hearings on the beam 34. Saidcounter-shaft 44 is hollow and has threaded into it a bolt 45, having ahead 46 thereon and carrying a cam 47 The said bolt and the cam 47thereon are keyed or otherwise firmly locked to the counter-shaft 44, sothat they rotate therewith. Outside the cam 47 and loosely mounted onthe bolt 45 is.

a circular disk or plate 48, having a plurality of radiating arms 49secured to the rear side thereof and projecting outwardly therefrom.

Slidingly mounted on the arms 49 and lying in the same plane with thecam 47 are the locking-dogs 50, the inner ends of said dogs beingadapted to be engaged by the cam 47. The said dogs consist of metal rodsor bars having notches or recesses 51 in their outer ends adapting themto engage the rivets in the base-flange of the can 23 and provided withflanged plates or yokes 51, which embrace the arms 49 of the disk 48, sothat they are held in contact with said arms, but are capable oflongitudinal movement thereon. When the dogs are in their normal orinoperative positions, the outei ends thereof do not project beyond theouter ends of the arms 49, the same being maintained in this position bymeans of the springs 52, which are connected to lugs or projections 53on the rear sides of said dogs and to a central ring or annulus 54,surrounding the shaft 44. The inner ends of the dogs 50 are rounded, fora purpose which will presently appear. Now I have shown in the drawingsthe disk 48 as being provided with four radiating arms 49. It isobvious, however, that a greater or less number of these arms may beemployed. The dogs 50, however, correspond in number with the arms 49 onthe disk 48, and the cam 47 has projections thereon corresponding innumber with the dogs 50. In the present instance four engaging portionshave been shown on the cam 47. As the disk 48 is loose on the bolt 45and as the cam 47 is fixed to said bolt, rotary movement of the cam 47may be imparted independently of the disk 48. When this is done,the'engaging or projecting portions of the cam 47 will be brought intocontact with the inner ends of the dogs 50 and said dogs will be thrownoutwardly.

To prevent the cam 47 from turning after the dogs 50 have been thrownoutwardly, a lock 47 is provided, the same consisting of a curved rodpivoted to the cam 47 and adapted when said cam is turned in onedirection or the other to engage one of the fixed arms 49 on the disk48that is to say, when the cam 47 has been turned independently of thedisk 48, so as to bring the highest points of the projections on saidcam beneath or behind the inner ends of the dogs 50, further independentmovement of the cam 47 is prevented by the engagement of the lock 47"with the adjacent arm 49 on the disk 48. After the dogs have been thrownoutwardly into locking position it is necessary in orderto restore thesame to their normal positions to reverse the direction of movement ofthe main drive-shaft 40. When the can 23 is to be connected up with theparts just described, which constitute a chuck, the neck thereof isfirst introduced into the grooves 21 or into frictional contact with thering 22 and the same thrown down into horizontal position, as shown inFig. 2 of the drawings. The frame 30 is then moved toward the can 23 byapplying pressure to the cross-rod 33, which constitutes the handle forsaid frame. In so doing the disk 48 and the dogs 50 are brought withinthe recess in the bottom of the can 23, so that when the said dogs 50are thrown outwardly in the manner just described the outer engagingends thereof will be brought into locking contact with the base-flangeof said can, the rivets therein seating themselves in the notches orrecesses 51. hen thus locked in place, the can may be rotated by turningthe main drive-shaft 40 through the action of the crank or handle 41.For scrubbing the exterior surface of the can I provide a brush 55, thesame being mounted upon a base 56, having a hinged con nection at itslower end to one side of the tank 1, so that the brush may be adjustedtoward or away from the exterior surface of the can operated upon. Thebase 56 has secured to it and extending upwardly therefrom a strap 57,provided with a flange 58, which extends outwardly over the top edge ofthe side of the tank to which said base 56 is pivoted. The flange 58 isprovided with an elongated slot 59, into which a wedge-shaped key 60 maybe introduced for the purpose of adjusting the base 56 and the brush 55,carried thereby, in one direction or the other-- that is to say, byintroducing the key 60 into the slot 59 on one side of the side of thetank or the other said brush 55 may be adjusted in one direction or theother.

that it is capable of a small degree of longitudinal movement in thetank 1.. The means by which this sliding connection is produced consistsof eyes or staples 61 on the rear side of the brush 55, similar eyes orstaples 62 on the base 56, and a rod 63, extending through said eyes 61and 62. By this it will be seen by reference particularly to Figs. 3 and4 of the drawings that the brush 55 may be moved.

connect said arms with the sleeve 71.

The brush 55 has a sliding connection with the base 56, so

of the can being operated upon with two pivoted sections 65 66, whichare normally urged outwardly or toward the can by means of the springs67 68. Longitudinal movement may be imparted to the brush 55 by means ofthe frame 30, the said frame abutting against one end of said brush.

The construction heretofore described is that which is employed for thescrubbing and cleansing of the cans themselves. When it is desired toscrub and clean the can-tops, the brushes 15 and 55 are dispensed with,the former being removed by disconnecting the stem 14 thereof from thebeam 8 of the brushcarrying frame 7. This may be readily done byloosening the set-screw 16 and slipping the stem 14 out of the socket inwhich it fits. In lieu of the brush 15 and the parts co5peratin gtherewith I employ the devices illustrated in Figs. 8 and 9 of thedrawings. The rod 69, which constitutes the stem of the brushes forscrubbing the covers, is introduced into the socket in the beam 8 of theframe 7, which was formerly occupied by the stem 14 of the brush 15, andis locked in place against movement by means of the set-screw 16. Thesaid rod 69 has a wedge-shaped head 70 upon its free end and has keyedthereto, so that it is capable of longitudinal movement thereon, asleeve 71. Pivoted to said sleeve is a brush 72 for scrubbing theexterior of the can-top 73, and also pivoted thereto are the arms 74,which carry the brushes 75 for cleaning the inner surface of the can-top73. The arms 74 are connected together, so that they are capable ofexpansion and contraction, by means of the slotted link 76 and arenormally urged inwardly by means of the springs 77, which The said armsare provided adjacent to their free ends with the inclined surfaces 78,which are adapted to engage the wedge-shaped head 70 of the rod 69, sothat when pressure is applied to the brushes 75 by an inward movement ofthe can-top 73 toward the outer fixed end of the rod 69 the inclinedsurfaces 78 will be brought into engagement with the inclined surfacesof the Wedge-shaped head 70, and the said brushes 75 will be spread orforced outwardly into contact with the inner surface of the flange orcollar of the can-top 73. Pressure upon the outer surface of saidcan-top may be applied by hand by grasping the brush '72 in an obviousmanner.

To connect the can-top 73 with the rotary shaft 44, I employ a block 79,which is dished out on its front face to receive thecurved upper surfaceof the can-top 73 and has an elongated channel 80 therein for receivingthe handle 81 of said can-top. When said handle 31 fits within thechannel or groove 80 and the block 79 is rotated, said block carrieswith it the can-top 73 by reason of the engagement of the handle 81 withthe side walls of said channel. The block 79 is locked to the disk 48 onthe end of the bolt 45 by means of a clamp consisting of a fixed jaw 82means of a set-screw 88.

and a movable jaw 83, both carried by the block 79. The jaw 82 consistsof a'bar which extends through the'blo'ck 79, projects from the rearside thereof, and has two inwardlyextending lugs or projections 84,between which the disk 48 fits. The jaw 83 also projects from the rearface of the block 79 and has a groove 85 therein which receives the edgeof the disk 48 opposite the lugs 84 on the fixed jaw 82. The said jaw 83is provided with a head 86, whichfits and is movable in a socket 87 inthe block 79'and is adjustable back and forth 'to bring the same intolocking engagement with the disk 48 by is locked to the disk 48 and thelatter becomes locked to the shaft 44by the engagement of the lock 47with one of the arms 49,

a turning movement of the shaft 44 through the operation of the maindrive-shaft 40 will cause a corresponding turning movement to be.imparted to the can-top 73, which will cause the same to rotate incontact with the brushes 72 and 75, with the result that the exteriorand interior surfaces of said-cantop are thoroughly scrubbed. By movingthe frame 30 toward the brushes 75 the latter are spread outwardly bythe means above described and brought into close contact with the innersurface of' said can-top.

The brush 15 (illustrated most .clearly in Fig. 3 of the drawings) hasbeen shown as projecting from one side only of the stem 14 thereof. Thisbrush can therefore engage but one side oftth'e interior surface of thecan 23 at a time; In Fig. of the drawings I have illustrated a modifiedform of collapsible brush which is in reality a double brush,

the same consisting of a stem 89, adapted to be inserted into the socketin the beam 8 of the brush-carrying frame 7 and locked in place by meansof the set-screw 16. Connected with the stem 89 on each side thereof isa brush 90, made upof the sections 91 and 92. The section 9l'is intendedfor brushing the interior surface of the sides and neck of the can andis shaped to conform to the shape of the can to be cleaned. The section92, on the other hand, is intended for brushing the interiorsurface ofthe bottom of the can and has a flatengaging portion.

97. The brushes 90 on opposite sides of the stem 89 are identical witheach other, so that a description of one only is necessary. By

this construction it will be seen that the brushes on opposite sides ofthe stem 89 may When the block 79 The section 91 is pivoted to the stem89 by means of a link "die 13.

be collapsed, as shown in dotted lines in Fig. 10, so that they lie insubstantially the same plane with the stem 89 and can be readilyintroduced through the contracted neck of the can to be scrubbed. Thesprings 95, however, acting upon the projecting ends of the links 93,tend to return the two brushes 90 to their normal outward orexpandedpositions, so that when the brush as a whole is introduced into the canand the brushes relieved said springs will throw said brushes outwardlyinto contact with the inner surface of the can. The said brushes areshown in this position in full lines in Fig. 10.

Milk-cans as ordinarily constructed are pro vided on opposite sides withpivoted bails 103, as shown in Fig. 1 of the drawings, and when the can23 is introduced into the machine for the purpose of being cleaned andscrubbed it is necessary that said bails be held down in close contactwith the body of the can in order to prevent interference between thesame and the brushes operating upon the exterior surface thereof. Themeans provided by me for retaining these bails in contact with the sidesof the can consists of an elastic strap or band 104,preferablyconstructed of coil-sprin g wire, having hooks 105 on the opposite endsthereof, which are adapted to engage the bails 103, as clearly shown inFig. 1 of the drawings. When the strap or band 104 is appliedasindicated, the bails 103 are prevented from flying outwardly away fromthe body of the can, and thereby interfering with the working parts ofthe scrubbing-machine- From the foregoing description it is thought thatthe operation of my device will be readily understood. Briefly stated,however, it is as follows: When it is desired to clean and scrub amilk-can, the tank 1 is filled to the desired height with water or othercleansing liquid and, if necessary, heated. The strap "104 is thenapplied to the bails 103 of the can,

and the brush-carrying frame 7 is turned upon its pivot to the positionshown in Fig. 1 of the drawings. This turning movement of thebrush-carrying frame may be effected by applying power to the crank orhandle 13 in the proper direction. The brush is now collapsed, and thecan 23 is placed in inverted position upon the block 20, with the edgeof the neck thereof fitting within the V-shaped grooves 21 or 'withinthe ring 22. In doing this the brush 15 becomes seated within the can23, and the same is then expanded to the position shown in Fig. 3 of thedrawings. With the can 23 on the block the frame 7 is lowered to theposition shown in Fig. 2 of the drawings by turning the crank or han-When in this position, the rear side of said frame abuts against theinner surface of the adjacent end of the tank 1 and the stem 14 of thebrush 15 lies in a horizontal position. The frame is now grasped by therod or handle 33 thereof and thrown forwardly toward the can 23, so thatthe chuck carried thereby will be introduced into the recess in ICC thebottom of the can 23, with the head 46 of the bolt 45 in frictionalengagement with said bottom. By turning the crank 41 and rotating theshaft 40, the gear 42 thereon, the pinion 43, and the counter-shaft 44the cam 47 is turned so that the peripheral projections thereon arebrought into contact with the inner ends :of the dogs 50 and the latterare thrown outwardly, so that they are brought into frictionalengagement with the baseflange of the can 23, the notches 51 in saiddogs straddling or embracing the rivets in said base-flange. The can 23is by this means locked to the driving mechanism of thedevice, and byturning the crank ll the same may be rapidly rotated. As the brush is incontact with the inner surface of said can and as the brush 55 is incontact with the outer surface thereof, this rotation of the can willcause a thorough and complete scrubbing of the same in the cleansingmaterial in the tank, which will result in the complete removal of alldirt and foreign matter adhering thereto. It will be understood, ofcourse,that as the block 20, constituting the chuck for the upper endofthe can, is capable of longitudinal movement on the rod or thebrush-stein let against the action of the spring 17 by moving the frame30 toward or from said stem 14 the can 23 may be moved so as to vary theposition of the same with respect to the brush 15, so as to cause theinner surface of the bottom thereof to be brought into contact with thesection 27 of said brush to a greater or less degree or to cause thesection to be broughtinto closer orlooser contact with that portion ofthe can between the neck and the cylindrical sides of the body. As theframe 30 is moved in one direction or the other it will be maintained inthe same horizontal plane as it is supported upon the fixed trunnions inthe tank. It will also move with it the brush 55, whose adjacent endlies in contact with said frame. When the can 23 has been sufficientlyscrubbed, a reverse movement of the drive-shaft will unlock the chuckfrom its engagement with the basefiange of said can by turning the cam47 so as to throw the projections thereon out of engagement with theinner ends of the dogs 50. The springs 52 will then act to retract saiddogs and move the same inwardly away from said base-flange. The frame30, carrying the chuck, can then be moved away from the can 23, and saidcan may be moved upwardly by turning the brush-carrying frame 7 to theposition shown in Fig. l of the drawings. The can can then be removed byfirst collapsing the brush 15 and slipping the same off of its seat onthe block 20.

To wash and scrub a can-top, a similar operation to that just describedwill be performed, except that the parts illustrated in Figs. 8 and 9 ofthe drawings will be used instead of those illustrated in the precedingfigures.

Where the term can is used in the following claims, I intend the same toinclude, of course, can-tops and other analogous devices.

Having now described my invention, what I claim as new, and desire tosecn re by Letters Patent, is-

1. In a scrubbing apparatus, the combination with a tank and a brush forthe inner surface of the article to be scrubbed, of a rocking framefulcrumed on said tank and movable toward and away from said brush, arotary shaft carried by said frame, and means for securing the articleto be scrubbed to said shaft.

2. In a scrubbing apparatus, the combination with a tank, of a framepivoted thereto, a brush whose stem is secured to said frame, a secondframe movable toward and away from said brush, a rotary shaft carried bythe latter frame, and means for securing the article to be scrubbed tosaid shaft.

3. In a scrubbing apparatus, the combination with a tank and a brush forthe inner surface of the article to be scrubbed, of a rotatable chuckfor gripping the article to be scrubbed, and a rocking frame fulcrumedon said tank, carrying said chuck and movable toward and away from saidbrush.

l. In an apparatus forscrubbing milk-cans,

the combination with a tank, of a stationary brush for the interior ofthe can, a laterallyadjustable and longitudinally-movable brush for theexterior of the can, and means for retating said can in contact withsaid brushes.

5. In an apparatus for scrubbing milk-cans, the combination with a tank,of a collapsible brush adapted to be introduced into the can andafterward expanded, a laterally-adjustable and longitudinally-movablebrush for the exterior of the can, and means for rotating said can incontact with said brushes.

6. In an apparatus for scrubbing milkcans,

the combination with a tank, of a brush-carrying frame pivoted thereto,a brush adapted to be introduced into the can, the stem of said brushbeing secured to said frame, a block constituting a chuck for the neckof the can loosely mounted on the stem of said brush, a spring actingupon the rear side of said block, a rotatable bodily-movable chuck forthe base of the can, and means for locking the latter chuck to said can.

7. In an apparatus for scrubbing milk-cans, the combination with a tank,of a brush-carrying frame pivoted thereto, a collapsible brush adaptedto be introduced into the can and afterward expanded, a blockconstituting a chuck for the neck of the can loosely mounted on the stemof said brush and hav ing a V-shaped'channel therein for receiving saidneck, a spring acting upon the rear side of said block, a bodily movablerotatable chuck for the base of the can, and means for locking said canto the latter chuck.

8. In an apparatus for scrubbing milk-cans, the combination with a tank,of a brush-carrying frame pivoted to said tank and adapted when inone-position, to engage one end of said tank, means for turning saidframe, a brush adapted to be introduced into the can, the stem of saidbrush being secured to said frame, a .blockconstitutiug a chuck for theneck of said can having V-shaped grooves or channels therein, and ametallic ring surrounding said groove, a coil-spring surrounding thestem of said brush and acting upon the rear side of said block, abodily-movable rotatable chuck for the base of the can, and means forlocking said can to the latter chuck.

9. In an apparatus for scrubbing milk-cans,

. the combination with a tank, of a brush adapted to be introduced intothe can for scrubbing the inner surface thereof, a second brush pivotedto the side of said tank for scrubbing the outer surface of the can,means for adjusting the latter brush toward and away from the can, arotatable chuck for the base of the can, and means for locking the canto said chuck.

.10. In an apparatus for scrubbing milkcans, the combination with atank, of a brush adapted to be introduced into the can for scrubbing theinner surface thereof, a second brush for scrubbing the outer surface ofthe can, a base for the latter brush on which the same is slidinglymounted, the said base being pivoted to the side of the tank, means foradjusting the base for moving the brush carried thereby toward or awayfrom the can, a rotatable chuck for the base of the can, and means forlocking the can to the chuck.

'11. In an apparatus for scrubbing milkcans, a collapsiblebrush for theinner surface of the can, comprising a fixed stem, parallel arms securedto the free end of said stem and extending in line therewith, and aplurality of brush-sections, the section for the bottom of the can beingpivoted at a point intermediate its ends to and between said parallelarms and projecting on opposite sides of said arms, the section for theneck of the can having a pivoted link connection with said stem and theremaining sections being pivoted to each other and pivoted respectivelyto the section for the bottom of the can and to that for the neck.

12. In an apparatus for scrubbing milkcans, the combination with a brushand a rotatable longitudinally-yielding support for one end of the can,of a rotary shaft and a chuck thereon for locking the other end of saidcan to said shaft.

13. In an apparatus for scrubbing milk cans, the combination with abrush and alongitudinally-movable yieldingly-mounted rotatable supportfor one end of the can, of a rotary shaft, and an expansible chuckcarried by said shaft for locking the other end of the milk-can thereto.

14. In an apparatus for scrubbing milkcans, the combination with a brushand a yieldingly-mounted rotatable support for one end of the can, of aframe movable toward and away from said support, a rotary shaft carriedby said frame, and an expansible chuck ablelocking-dogs adapted toengage the baseflange of the can, and a cam carried by said shaft forthrowing said dogs outwardly into locking engagement with saidbase-flange.

16. In an apparatus for scrubbing milkcans, the combination with a brushand a yieldingly-mounted rotatable support for one end of the can, of arotary shaft bodily movable toward and away from said support, a diskloosely connected with said shaft having a plurality of radiating armsthereon, lockingdogs for the base-flange of the can, slidingly mountedon said arms, and a cam secured to said shaft and adapted to engage theinner ends of said dogs for forcing the same ontwardly into lockingengagement with said flange.

17. In an apparatus for scrubbing milkcans, the combination with a brushand a yieldingly-mounted rotatable support for one end of the can, of arotary shaft bodily movable toward and away from said support, a diskloosely connected with said shaft having a plurality of radiating armsthereon, locking-dogs for the base-flange of-the can, slidingly mountedon said arms, springs for retaining said dogs in their innermostpositions, and a cam secured to said shaft and engaging the inner endsof said dogs for forcing the same outwardlyintolocking engagement withsaid flange.

18. In an apparatus for scrubbing milkcans, the combination with a brushand a yieldingly-mounted rotatable support for one end of the can, of arotary shaft bodily movable toward and awayfrom said support, a diskloosely connected with said shaft having a plurality of radiating armsthereon, locking-dogs for the base-flange of the can, slidingly mountedon said arms, and having notched outer ends, a cam secured to said shaftand adapted to engage the inner ends of said dogs for forcing the sameoutwardly into locking engagement with said flange, a ring surroundingsaid shaft, and springs connecting said ring with said dogs.

19. In an apparatus for scrubbing milkcans, the combination with a brushand a yieldingly-mounted rotatable support for one end of the can, ofarotary shaft bodily movable toward and away from said support, a diskloosely connected with said shaft having a plurality of radiating armsthereon, locking-dogs for the base-flange of the can slidingly mountedon said arms, a cam secured to said shaft having projections thereon forforcing the same outwardly into locking engagement with said flange, andmeans for limiting the turning movement of said cam with respect to saiddogs.

20. In an apparatus for scrubbing milkcans, the combination with a brushand a yieldingly-mounted rotatable support for one end of the can, of arotary shaft bodily movable toward and away from said support, a diskloosely connected with said shaft having a plurality of radiating armsthereon, lockingdogs for the base-flange of the can, slidingly mountedon said arms, a cam secured to said shaft having projections thereonadapted to engage the inner ends of said dogs for forcing the sameoutwardlyinto locking engagement with said flange, and a lock carried bysaid cam and adapted to engage one of said arms for limiting the turningmovement of said cam with respect to said dogs.

21. In an apparatus for scrubbing milkcans, the combination with a brushand a yieldingly-mounted rotatable support for one end of the can, of arotary shaft bodily movable toward and away from said support, a diskloosely connected with said shaft having a plurality of radiating armsthereon, lockingdogs for the base-flange of the can, slidingly mountedon said arms, and a curved rod pivoted to said cam and projecting beyondthe periphery thereof, the said rod being adapted to engage one or theother of said arms for limiting the turning movement of said cam withrespect to said dogs.

22. In an apparatus for scrubbing milkcans, the combination with a tank,a brush and a yieldingly-mounted rotatable support for one end of thecan, of fixed trunnions secured to one end of said tank and projectingin- Y ward 1y therefrom, a horizontally-disposed rod connecting thesides of said tank beneath said trunnions, a frame comprising parallelside pieces having slots in their lower ends which embrace said rod, anda pivotally'rnounted beam connected to said side pieces and supportedupon said trunnions, a rotary shaft mounted on said beam, and anexpansible chuck carried by said shaft for connecting the end of themilk-can opposite said support to said shaft.

23. In an apparatus for scrubbing milkcans, the combination with atank,a brush and a yieldingly-mounted rotatable support for one end ofthe can, of fixed trunnions secured to one end of said tank andprojecting inwardly therefrom, ahorizontally-disposed rod connecting thesides of said tank beneath said trunnions, a frame comprising parallelside pieces having slots in their lower ends which embrace said rod, anda pivotally-mounted beam connected to said side pieces and supportedupon said trunnions, a rotary shaft mounted on said beam, a bolt securedto said shaft, in line therewith, a disk loosely mounted on said bolthaving radiating arms thereon, locking-dogs slidingly mounted'on saidarms, and a cam secured to said shaft and adapted to engage the innerends of the said dogs for forcing the same outwardly into lookingengagement with the base-flange of the can.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

RICHARD NELSON.

Witnesses:

JAMES L. NORRIS, GEO. W. REA.

